Hand stoker



Jul 3; 1923.

F. C. STIMMEL HAND STOKER Filed April 5, 1922 4 Sheets-Sheet 1 4 Shets-Sheet 2 di a July 3, 1923.

F. C, STIMMEL HAND STOKER Y Filed April 5, 1922 July 3, 1923.

HAND STOKER Filed April 5, 1922 4 Sheets-Sheet 3 July 3, 1923.

F. C. STIMMEL HAND STOKl-J'H Filed April 5. 1922 4 Sheets-Sheet 4 wllllllllllllll Patented July 3, 1923. g

' WIT- v STAT P H-N FREDERICK c; 's'rIMME or cnnrrsnooen, TENNESSEE; ns'srenon To 'THE' CASEY- HEDGES' 003 a CORPORATION on 01:10;

Hnnn STOKEIR.

' Application filed April 5,

To allwhomz'tmay concern: 1 v Be it knownthat-iI; FREDERICK CJSTIM- Mime citizen 'of the United States, residing at Chattanooga, in the county of Ham, 5 iltonand-Sta'te of. Tennessee, have invented certain' new and useful Improvements in Hand Stokers, of which the following isa full, clear, and. exact specification. ,..This. invention relates to hand stokers for 1 boiler furnaces, anduhas for its object to provide an improved:progressive feed grate whichimay beiopera tedvbyihand. I V A special vobject of the invention.is,.--to provideia' grate of the character described llliWlllCll the rocking'or oscillating grate members are normally arranged-asa series of horizontal stepswhich will preventthe fuel from tobogganingd'ownthe grate. ;In. clined stationary grate members are-jarranged between adjacent rocking members and serve as tie bars between the bearing bars or side rails which, support the grate. V Said stationary grate members carry v"the journals bearings t for the, rocking members so that-the entire grate surface is supported wellnaboveethe siderailsmor bearing bars which are consequently not eXpoisedfto the action of the firegth'at might cause, sagging thereof vand render the-ggrate inoperative.-

The invention will be first hereinafter described in: connecti0n-;with the .accom panying; drawings, which constitute part of this; specification, and then more specifi cally defined in the-claims at the end of the description); i x ;-In the accompanying drawings 2 7 1Figure l is a longitudinal vertical section through a boiler furnace, showing; a

hand stoker constructed substantially in a0- cordancewith this invention mounted thereiniinelevation. v c

,Figure 2- is av'simil'ar view; showing the grate or stoker in section and the rocking members thereof in raisedposition, as. when thefuel is being fedforward or downwar into the furnace. a

t Figure 3 is a similar; view showing the rocking gratemembersin lowered position an t e d mp plat ppe -r 1,- Figure 4;;is abroken-' plan view of the lower. end ,portionof the-grate or stoker; the front dead" grate: bar; at the upper end I of said grate"being als'o showninplan. Figure 5 c. isi;.a;;detailed longitudinal secpoint; 1 9

V -F1gure7is a' detailedviewgof onerendgof c the}: upper end 1922 serialiqofsaiaeia tion: of the. lower ,endportion of tliegrate or stolrerrwith parts broken away and re moved.- f

; V Figure 6 is ardetailed endview the connection between the longitudinal hear:

ing bars and, caps at the lower end of the grateandthe transverse tie bar catrthat the front dead grate bar at of the grate or stoker; and

Figure 8 is a'section on the line As shown inF igure. '1, the firebox ofal'" boiler furnaceis indicatedat lythe fuel door, leading thereto be'ingjindicated at 2-, the fire -wall"at3 andthe boiler atet; iA'n arch 5- is preferably constructed over the front end of the fireboxito force thev0latile gases over the hot bed of coals at therear end. of said firebox, thus preventing moke which would otherwisebevcaused; by the in complete combustion of. said volatile gases that are first ll 'i hePI'oeess Qf rni g a v he n ll edis oki g r pr sre ce -e d tends from the fuel door 2 'to the'firewall} plurality of stationary inclined grate members 8' alternating with said rocking-z members, whereby the fuel may bereadily fedfor I I I ward into'the' furnace step by step when the rocking members-"are raised, but the to- Y bogganingofsaid fuel isprevented. I The grate members are supported by longitudinal bearing bars" or side rails 9; ar-

.are secured to; a transverse tie-bar im Said grate comprises ajplurality of. jnor; mallyhorizontal rocking members zand; a1

bedded in the fire wallfi'. f Said barsl9 have f a series of long'lugs 12 alternatingew;ith short lugs 13 on their upper inclined edges The stationary grate members 8 are bolted at -80 to the long lugs 12 and'thusservegas .tie bars for said -l ongitudinal bearing bars e hort lug 1 31se et9; uppertth free upper edge portions of the rocking grate members 7 when they are 'normal j lowered. position." At" theL-ends of the 'stationary-: ;grate 7 bars there are bearing notches 14 for the trunnions or pivot pins 15 on-the rear edges of the rocking grate members. The stationary grate members are slotted at 16 and the rocking members at-17 to allow ashes to passthrough them.

The rocking grate members 7 have depending arms 18 joined thereto in line with the trunnions 15 and pivoted at their lower ends to link bars 19 extending along the inner faces of the bearing bars '9 and connected near their upper ends by links 20 I to a hand lever 22 mounted in a foot plate 21 outside the furnace. Said lever 22 is adapted to be oscillated in said foot plate for rocking the members 7 of the grate from the position shown in Figures 1 and 3 tothe bearing bars 9 and is substantially T-shaped in cross section. The inner top flange'26 of'said bar 23 is preferably perforated at 27 Figure 4:, to'permit ashes to pass through it.

The tie bar 11, which is seated in the fire wall 3 and supports the lower ends of the bearing bars 9, also has bolted thereto'cap rails 28', as bestshown inFigures 5 and 6.

Said cap rails rest upon the lower end portions of the bearing bars 9 and have notches 29 in which are journ'aled trunnions 30 on the rear edge of a dump p1ate31 which normally is arranged in a horizontal position, asillustrated in Figures 1, 2 and 1-, and extends between said cap rails at opposite sides of the grate and from the fire wall to the lowest stationary grate member 8; The front ends of said cap rails have depending lugs 32 bolted to the lowest ones of the long upstanding lugs 12 on the bearing bars or rails 9, as best shown in Figure 5. The dump plate 31 has. depending arms 33 at its free edge to which are pivotally connected an actuating rod or bar 34 extending through the front plate of the furnace and having a notch 35 for retaining it in advanced position to support the dump plate iii-horizontal position, Figures 1 and 2; As shown in Figure'3, when the rod 34 is raised at its outer end to disengage its notch 35 from the front plate 36 of the furnace, said rod may be pushed inward for dropping the dump plate to discharge accumulated ashes therefrom into the ash pit 37.

grate having alternating stationary and rocking transverse grate bars, said stationary bars being inclined and the rocking bars being normally horizontal, of means for rocking said latter bars for progressively feeding fuel along the grate.

2. In a stem, the combination with-an inclined grate having alternating stationary and rocking transverse grate bars, said rocking bars being normally arranged as a series of horizontal steps, of means for rocking said latter bars for progressively feeding fuel down the-incline of the grate.

3. In a stoker,the combination with an inclined grate having alternating stationary and rocking transverse grate bars, the latter bars being normally arranged as a series of 5. In a stoker, a grate comprising, in combination alternating stationary and rocking transverse grate bars, and side rails having spaced upstandinglugs, said stationary bars being fastened to said lugs andhavingv jour-o nal notches spaced above the same, said rocking bars having trunnionsto fit in said notches of the stationary bars, and thefree edges of said rocking'bars being supported on said rails: when in normal position.-

6. In a-stoker, a-gratecomprising, in combination alternating stationary and rocking transverse grate bars, and side rails having spaced lugs along 'their'upper edges, said stationary bars being fastened tosaid rails and havlng the rocking bars journaled therein, and the free edges of said rocking barsbeing supported on said lugs when in normal posltion. I I

7. In a stoke'r, a grate comprising, in combination alternating stationary and rocking transverse grate bars, and side rails having spaced lugs along their upper edges, said stationary bars being fastened to alternate ones of said lugs,-and the free edges of the rocking bars being normally supported on the'other ones of said lugs. I r 8. In a stoker, a grate comprising, in combination alternating stationary and rocking transverse grate'bars, and side" rails for supporting said stationary bar's and arranged well below the gratesurface, bearings-on said stationary bars, trunnions on said rocking bars engaging said bearings, arms depending from-said-rockingibars, and means extending along the inner faces of said rails for actuating said arms in unison.

9. In a stoker, a progressive feed grate having alternating stationary and rocking transverse grate bars, the latter barsbeing normally arranged as a series of horizontal steps, the stationary bars being inclined, and both kinds of bars being slotted for the purpose specified.

10. In a stoker, a progressive feed grate comprising, in combination, grate bars and side rails along which said bars are mounted, a dump plate arranged between the inner ends of the side rails, said rails extending f to the inner end of said dump plate and caps covering the inner end portions of the rails and extending along the sides of said dump plate, the latter being journaled in I comprising, in combination, grate bars and side rails along which said barsare mounted, a tie bar connecting the inner ends of said rails, a dump plate arranged between the inner ends ofsaid rails, and caps covering the inner ends of said rails, each cap being fastened at one end to said tie bar and at the other end to one of the rails, said caps e2 tending along the sides of said dump plate, and the latter being journaled in said caps.

In testimony whereof I have signed my 'name to this specification. r

FREDERICK o." STIMMEL. 

